we understand that at least three weapons were found at the scene. one of them a glock, one of them a sig sauer and one of them a 223 bushmaster. we don't know exactly what kind of models but we have that as well. and here's more about how it all came down from start to finish. these connecticut parents had dropped off their kids for a typical friday at school. then about 9:30 in the morning, they received robo calls and text messages. sandy hook elementary school was put on alert. >> i just got a message saying -- from the superintendent that there was -- there was an unconfirmed shooting and, you know, everybody is in lock down. >> i was a little scared. i felt sick to my stomach. >> reporter: a gunman was firing away as teachers went into lockdown and parents rushed to the scene. >> i heard screaming. and so we -- we went -- like we went to the wall and we sat down and then police came in. it's like is he in here? then he ran out. then our teacher -- then somebody yelled get to a safe place. >> inside, children were hiding as a gunman fired away.